Road-building machine



"umll J. W. HELZEL.

Y R'oAD'BUlLnsNG MACHINE,

APPLlC/TION FLxED MAR. 1l, 1920.

O Hummm Patenze JuneV if, MEL

I, W. HELTZEL.

ROAD BUILDING MACHINE.

APPLICATION man Mm, 11, 1920.

:A from/frs of 1Warren,

JOSEPH W. HELTZEL, OF WARREN, OHIO.l

ROAD-BUILDING MACHINE.

Application led March 11, 1920. Serial No.

To all iti/tom if may concern.'

lle it known that l, Josnrii lV. HisLrZnL, a citizen of the United States, and a resident in the county ol Trumbull and State of Ohio, have invented a certain new and useful Improvement in Road-Building Machines, of which the following is a specific-ation.

My invention is an improvement in road building; machines, and has t'or its object to provide a machine of the character specified, especially adapted for tamping brick and newly laid concrete, as for instance in brick paving, wherein a taniping,r member is provided ot' relatively large extent adapted to rest upon the surface ot' the pavement, and a rain contacting with such first named member to thoroughly tamp the brick 0I' concrete in place, thus causing the same t0 ha vo a smooth surface.

In the drawings Figure l is a top plan view of the improved machine,

Fig. 2 is afi-ont vie-w with the pavement in section,

Fig. 3 is a section on the line 3-3 of Fig., 2, and

Fig, 4 is a partial tamping member.

ln the present embodiment of tho invention, a suitable frame l is provided oit' substantially rectangular toi-mation, having intei'mediate the vfront and rear ends thereot' a pair of laterally spaced cross bars i2. Wheels 3 are provided for supporting the frame, the said wheels beinen journaled in the arms ol yokes 4, whosebodics are secured to the underside of' the frame at the cornersthereot", and these wheels are flanged to riin upon rails 5 which are journaled iipon opposite sides of the l'rame, as indicated at 6.

A suitable motor, indicated at 7 in the present instance, an internal combustion engine, is supported by the crossbars 9. at approximately the center ot' said bars. and the shaft of this motor is connected by gearing 8 with a shaft 9 jonrnaled in bearings l0 on the cross bars. The said shaft has a pair of' cams l1, each cani being a disk havf ing' a hub rigidly secured to the shalt, and havingiI a laterally extending marginal flange 12 at its outer tace, which flange lis open at one point, as shown at 13.

The ram is composed of a beam 14, haring a channel-shaped reinforcing shoe 15 Speccation of Letters Patent.

perspective View of Athe Patented' June 1921. 364,958.

on its under edge, and this beam is held between a pair ot' channel plates 1G. the said plates haring their channels facinfr down wardly. The channel plates are ctnnect'ed at their edges by the channel plate lt and at each cani a bracket 18 is secured to the plate 1 7. llach bracket carries a laterallyextending roller 1S) which engages thc flange 1;). ol' the adjacent cam. The opening 13 in the flange of the cani ends at that portion ot the flange 12 which is farthest from the center. The the ram rests upon the tampinrr member, that is when it is in its lowestl position. the end of' the flange 12 will engage beneath the ifollerand will'gradnally lit'tthe rain until it again passes ont at the opening l, whose other end is at thatportion ot the flange which is nearest the'shaf l`hns the rollers and the ram will be init-ted to drop once during the. rotation of tho shat't l). The beam ll is connected to the channel plates by bolts and nuts 2l), and the said beam extends well below the lower` ends ot' the channel plates.

The case consistingr of and 1T in which the tamping beam is mounted, has pivoted near its ends links 2l, which arc pivoted at their other ends to depending arms 2z from the frame. Thus the case is swingingly supported and held from rearward movement with the cam. It will be understood that this beam may be constructed in thesame inanncr as that shown in my copendingr application, Serial No. 364.958 lile'l March 1l, 1920. to permit it to conform with the crown ot' the road where used on a crowned road. l

'l'he tan'iping member is composed of a series ot' plates 23 connected at one end by a cross plate :24, the plates 2li andrl being rigidlysecnied together by bolts and nuts 25. The tainpiii; member is connected at its l'ront end by hinges {3l} to a cross plate '2i' carried by the arms ol' the forward .vokcS Je and the underfaces ot tlu` plates :23 arc reinforced. as shown at :28. i

In use, the machine is drawn over the roadway moving; on the rails with the tamp ing member slidingf on the table` which may be coi-ered with sand in thel usual manner. As thc machine travels. the shalt i) is rotated by the motor and the ramis lifted and dropped a. number ot' times per minnlcdepending upon the revolutions of the shaft. At the point where thc ram engages the arrangement is such that when,

lifted and will he perthe elements 16 i depending from the frame. When tamping newly laid brick, this smoothing plate is not required.

In operation, the machine is drawn over the road in any suitable manner, it being understood that the motor might be 'geared to the wheels 3 if desired. As the machine moves the 'tamping member moves in Contact with the pavement and the ram is lifted and permitted to fall heavily upon the tamping member. Thus the pavement is thoroughly tamped and surfaced.

` apart slightly from cach other and rigidly In they-usual method of finishing brick paving, a roller is used, and the said roller presses a brick rst on one edge, then in'the center, and then on the opposite edge, thus causing the foundation for the brick to. have a convex top surface. rPhat is, the brick is rocked by the roller, and the supporting surface for the brick is shaped by the rocking of the brick, The present invention eliminates this undesirable shape in the brick foundation, tamping the brick as a whole firmly and solidly downward, so that there is no tendency to rock.

4Having thus described my' invention., I

' claim l. A machine of the character specified comprising a wheel supported frame,a tamp ing member hinged to the front of the frame and adapted to slide upon the pavement as the frame moves over the roadway, a ram for striking said tamping member transversely of the, length thereof and approximately at the center, and means for lifting the ram and permitting it to fall upon the tamping member, said tamping member comprising a series of longitudinallyextending plates arranged alongside each other' and spaced connected at their rear ends, said plates being hinged at their forward ends to the plate and being reinforced on, their under faces.

2, A machine of the character specified comprising a wheel supported frame, a tamping lnember hinged to the front ofthe frame and adapted to slide upon the pavement as the frame moves over the roadway, a ram for striking said tamping member transversely of the length thereof and approximately at the center, and means for lifting the ram and permitting it to fall upon the tamping member,I the ram oom- .transversely of the length thereof and approximately at the center, and power operated means for lifting the ram and permitting it to fall upon the tamping member.

4. A machine of the character specified comprising a wheel supported frame, a.

tamping member hinged to the frame at the front thereof and below the level of the 'frame to move upon the pavement to be tamped, a ram for engaging the tamping member, and power operated means for lifting and dropping the ram at rapid intervals, said lifting' means comprising a shaft, cam disks on the shaft having laterally extending flanges eccentric to the shaft, said flanges heilig cut away between the highest and lowest points at one side of the shaft, the ram havin rollers engaged within the flanges.

5. l machine of the character specified comprisinga wheel supported frame, a

tamping member hinged to the frame at the front thereof and below the level of the frame to move upon the' pavement to be tamped, a ram for engaging the tamping member, and power operated means for lifting and dropping the ram at rapid intervals.

JOSEPH W. HELTZEL. 

